Extendable mobile phone stand



FIG. 1 is a perspective view of an extendable mobile phone stand, showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines depict portions of the extendable mobile phone stand that form no part of the claimed design. 

CLAIM The ornamental design for an extendable mobile phone stand, as shown and described. 